181146540 has 24 divisors (see below), whose sum is σ = 507210480. Its totient is φ = 48305728.

The previous prime is 181146523. The next prime is 181146583. The reversal of 181146540 is 45641181.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 181146498 and 181146507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509495 + ... + 1509614.

It is an arithmetic number, because the mean of its divisors is an integer number (21133770).

Almost surely, 2^181146540 is an apocalyptic number.

181146540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181146540 is an abundant number, since it is smaller than the sum of its proper divisors (326063940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181146540 is a wasteful number, since it uses less digits than its factorization.

181146540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019121 (or 3019119 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 181146540 is about 13459.0690614173. The cubic root of 181146540 is about 565.8178981076.

The spelling of 181146540 in words is "one hundred eighty-one million, one hundred forty-six thousand, five hundred forty".